APA
United Nations Industrial Development Organization, United Nations Industrial Development Organization, . (1973). Carbonization and hydrogenation of coal. New: York United Nations U S A.
Chicago
United Nations Industrial Development Organization, United Nations Industrial Development Organization, . 1973. Carbonization and hydrogenation of coal. New: York United Nations U S A.
Harvard
United Nations Industrial Development Organization, United Nations Industrial Development Organization, . (1973). Carbonization and hydrogenation of coal. New: York United Nations U S A.
MLA
United Nations Industrial Development Organization, United Nations Industrial Development Organization, . Carbonization and hydrogenation of coal. New: York United Nations U S A. 1973.